<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Smarty {html_select_date} plugin
 *
 * Type:     function<br>
 * Name:     html_select_date<br>
 * Purpose:  Prints the dropdowns for date selection.
 *
 * ChangeLog:<br>
 *           - 1.0 initial release
 *           - 1.1 added support for +/- N syntax for begin
 *                and end year values. (Monte)
 *           - 1.2 added support for yyyy-mm-dd syntax for
 *                time value. (Jan Rosier)
 *           - 1.3 added support for choosing format for
 *                month values (Gary Loescher)
 *           - 1.3.1 added support for choosing format for
 *                day values (Marcus Bointon)
 *           - 1.3.2 support negative timestamps, force year
 *             dropdown to include given date unless explicitly set (Monte)
 *           - 1.3.4 fix behaviour of 0000-00-00 00:00:00 dates to match that
 *             of 0000-00-00 dates (cybot, boots)
 * @link http://smarty.php.net/manual/en/language.function.html.select.date.php {html_select_date}
 *      (Smarty online manual)
 * @version 1.3.4
 * @author Andrei Zmievski
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param array
 * @param Smarty
 * @return string
 */
function smarty_function_html_select_date($params, &$smarty) {
  require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
  require_once $smarty->_get_plugin_filepath('shared','make_timestamp');
  require_once $smarty->_get_plugin_filepath('function','html_options');
    /* Default values. */
  $prefix          = "Date_";
  $start_year      = strftime("%Y");
  $end_year        = $start_year;
  $display_days    = true;
  $display_months  = true;
  $display_years   = true;
  $month_format    = "%B";
    /* Write months as numbers by default  GL */
  $month_value_format = "%m";
  $day_format      = "%02d";
    /* Write day values using this format MB */
  $day_value_format = "%d";
  $year_as_text    = false;
    /* Display years in reverse order? Ie. 2000,1999,.... */
  $reverse_years   = false;
    /* Should the select boxes be part of an array when returned from PHP?
       e.g. setting it to "birthday", would create "birthday[Day]",
       "birthday[Month]" & "birthday[Year]". Can be combined with prefix */
  $field_array     = null;
    /* <select size>'s of the different <select> tags.
       If not set, uses default dropdown. */
  $day_size        = null;
  $month_size      = null;
  $year_size       = null;
    /* Unparsed attributes common to *ALL* the <select>/<input> tags.
       An example might be in the template: all_extra ='class ="foo"'. */
  $all_extra       = null;
    /* Separate attributes for the tags. */
  $day_extra       = null;
  $month_extra     = null;
  $year_extra      = null;
    /* Order in which to display the fields.
       "D" -> day, "M" -> month, "Y" -> year. */
  $field_order     = 'MDY';
    /* String printed between the different fields. */
  $field_separator = "\n";
  $time = time();
  $all_empty       = null;
  $day_empty       = null;
  $month_empty     = null;
  $year_empty      = null;
  $extra_attrs     = '';

  foreach ($params as $_key=>$_value) {
    switch ($_key) {
      case 'prefix':
      case 'time':
      case 'start_year':
      case 'end_year':
      case 'month_format':
      case 'day_format':
      case 'day_value_format':
      case 'field_array':
      case 'day_size':
      case 'month_size':
      case 'year_size':
      case 'all_extra':
      case 'day_extra':
      case 'month_extra':
      case 'year_extra':
      case 'field_order':
      case 'field_separator':
      case 'month_value_format':
      case 'month_empty':
      case 'day_empty':
      case 'year_empty':
        $$_key = (string)$_value;
        break;

      case 'all_empty':
        $$_key = (string)$_value;
        $day_empty = $month_empty = $year_empty = $all_empty;
        break;

      case 'display_days':
      case 'display_months':
      case 'display_years':
      case 'year_as_text':
      case 'reverse_years':
        $$_key = (bool)$_value;
        break;

      default:
        if(!is_array($_value)) {
          $extra_attrs .= ' '.$_key.'="'.smarty_function_escape_special_chars($_value).'"';
        } else {
          $smarty->trigger_error("html_select_date: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
        }
        break;
    }
  }

  if (preg_match('!^-\d+$!', $time)) {
  // negative timestamp, use date()
    $time = date('Y-m-d', $time);
  }
  // If $time is not in format yyyy-mm-dd
  if (preg_match('/^(\d{0,4}-\d{0,2}-\d{0,2})/', $time, $found)) {
    $time = $found[1];
  } else {
  // use smarty_make_timestamp to get an unix timestamp and
  // strftime to make yyyy-mm-dd
    $time = strftime('%Y-%m-%d', smarty_make_timestamp($time));
  }
  // Now split this in pieces, which later can be used to set the select
  $time = explode("-", $time);

  // make syntax "+N" or "-N" work with start_year and end_year
  if (preg_match('!^(\+|\-)\s*(\d+)$!', $end_year, $match)) {
    if ($match[1] == '+') {
      $end_year = strftime('%Y') + $match[2];
    } else {
      $end_year = strftime('%Y') - $match[2];
    }
  }
  if (preg_match('!^(\+|\-)\s*(\d+)$!', $start_year, $match)) {
    if ($match[1] == '+') {
      $start_year = strftime('%Y') + $match[2];
    } else {
      $start_year = strftime('%Y') - $match[2];
    }
  }
  if (strlen($time[0]) > 0) {
    if ($start_year > $time[0] && !isset($params['start_year'])) {
    // force start year to include given date if not explicitly set
      $start_year = $time[0];
    }
    if($end_year < $time[0] && !isset($params['end_year'])) {
    // force end year to include given date if not explicitly set
      $end_year = $time[0];
    }
  }

  $field_order = strtoupper($field_order);

  $html_result = $month_result = $day_result = $year_result = "";

  $field_separator_count = -1;
  if ($display_months) {
    $field_separator_count++;
    $month_names = array();
    $month_values = array();
    if(isset($month_empty)) {
      $month_names[''] = $month_empty;
      $month_values[''] = '';
    }
    for ($i = 1; $i <= 12; $i++) {
      $month_names[$i] = strftime($month_format, mktime(0, 0, 0, $i, 1, 2000));
      $month_values[$i] = strftime($month_value_format, mktime(0, 0, 0, $i, 1, 2000));
    }

    $month_result .= '<select name=';
    if (null !== $field_array) {
      $month_result .= '"' . $field_array . '[' . $prefix . 'Month]"';
    } else {
      $month_result .= '"' . $prefix . 'Month"';
    }
    if (null !== $month_size) {
      $month_result .= ' size="' . $month_size . '"';
    }
    if (null !== $month_extra) {
      $month_result .= ' ' . $month_extra;
    }
    if (null !== $all_extra) {
      $month_result .= ' ' . $all_extra;
    }
    $month_result .= $extra_attrs . '>'."\n";

    $month_result .= smarty_function_html_options(array('output'     => $month_names,
        'values'     => $month_values,
        'selected'   => (int)$time[1] ? strftime($month_value_format, mktime(0, 0, 0, (int)$time[1], 1, 2000)) : '',
        'print_result' => false),
        $smarty);
    $month_result .= '</select>';
  }

  if ($display_days) {
    $field_separator_count++;
    $days = array();
    if (isset($day_empty)) {
      $days[''] = $day_empty;
      $day_values[''] = '';
    }
    for ($i = 1; $i <= 31; $i++) {
      $days[] = sprintf($day_format, $i);
      $day_values[] = sprintf($day_value_format, $i);
    }

    $day_result .= '<select name=';
    if (null !== $field_array) {
      $day_result .= '"' . $field_array . '[' . $prefix . 'Day]"';
    } else {
      $day_result .= '"' . $prefix . 'Day"';
    }
    if (null !== $day_size) {
      $day_result .= ' size="' . $day_size . '"';
    }
    if (null !== $all_extra) {
      $day_result .= ' ' . $all_extra;
    }
    if (null !== $day_extra) {
      $day_result .= ' ' . $day_extra;
    }
    $day_result .= $extra_attrs . '>'."\n";
    $day_result .= smarty_function_html_options(array('output'     => $days,
        'values'     => $day_values,
        'selected'   => $time[2],
        'print_result' => false),
        $smarty);
    $day_result .= '</select>';
  }

  if ($display_years) {
    $field_separator_count++;
    if (null !== $field_array) {
      $year_name = $field_array . '[' . $prefix . 'Year]';
    } else {
      $year_name = $prefix . 'Year';
    }
    if ($year_as_text) {
      $year_result .= '<input type="text" name="' . $year_name . '" value="' . $time[0] . '" size="4" maxlength="4"';
      if (null !== $all_extra) {
        $year_result .= ' ' . $all_extra;
      }
      if (null !== $year_extra) {
        $year_result .= ' ' . $year_extra;
      }
      $year_result .= ' />';
    } else {
      $years = range((int)$start_year, (int)$end_year);
      if ($reverse_years) {
        rsort($years, SORT_NUMERIC);
      } else {
        sort($years, SORT_NUMERIC);
      }
      $yearvals = $years;
      if(isset($year_empty)) {
        array_unshift($years, $year_empty);
        array_unshift($yearvals, '');
      }
      $year_result .= '<select name="' . $year_name . '"';
      if (null !== $year_size) {
        $year_result .= ' size="' . $year_size . '"';
      }
      if (null !== $all_extra) {
        $year_result .= ' ' . $all_extra;
      }
      if (null !== $year_extra) {
        $year_result .= ' ' . $year_extra;
      }
      $year_result .= $extra_attrs . '>'."\n";
      $year_result .= smarty_function_html_options(array('output' => $years,
          'values' => $yearvals,
          'selected'   => $time[0],
          'print_result' => false),
          $smarty);
      $year_result .= '</select>';
    }
  }

  // Loop thru the field_order field
  for ($i = 0; $i <= 2; $i++) {
    $c = substr($field_order, $i, 1);
    switch ($c) {
      case 'D':
        $html_result .= $day_result;
        break;

      case 'M':
        $html_result .= $month_result;
        break;

      case 'Y':
        $html_result .= $year_result;
        break;
    }
    // Add the field seperator
    if($i < $field_separator_count) {
      $html_result .= $field_separator;
    }
  }

  return $html_result;
}

/* vim: set expandtab: */

?>
